Udon Kubo, a game and AI programer who has spent most of his life severely physically and mentally bullied, he suddenly finds himself in a situation where he witness's his own death, or so he thought. He discovers he has awaken up in a new world, a dungeon crawl world, it doesn't take long for the ways of his old life to come into his new life. Udon is soon alone, betrayed and on the verge of another death, with no one to turn too, and no way to get back to his world, he is left with only a Crystal Clear Gem. Now, Udon must climb the Dungeons floors to get the revenge he so desperately craves.